Speaker



FIG. 1 is a top and right front perspective view of a speaker, showing my design;

FIG. 2 is a front elevational view of my design;

FIG. 3 is a rear elevational view of my design;

FIG. 4 is a left side elevational view of my design, with the right side elevational view being a mirror image thereof; and,

FIG. 5 is a top plan view of my design, with the bottom plan view being a mirror image thereof. 

The ornamental design for a speaker, as shown and described. 